Socket or collet



(No Model.)

4 J. D. COX, Jr.

SOCKET 0R GOLLET. No. 594,329. Patented Nov. 23, 1897.

ATTY

VVVVV\\\\\\\\\\\ I TENS WMITNO" W MING N D C UNITED STATES PATENTOFFICE.

JACOB DIOOX, JR, OF CLEVELAND, OHIO.

SOCKET OR COLLET.

SPECIFICATION forming part of Letters Patent No. 594,329, dated November23, 1897.

Application filed March 24, 1897. Serial No. 629 ,074. (No model.)

To all whom it may concern- Be it known that I, JACOB D. COX, Jr., acitizen of the United States, residing at Cleveland, in the county ofCuyahoga and State of Ohio, have invented certain new and usefulImprovements in Sockets or Collets; and I do declare that the followingis a full, clear, and exact description of the invention, which willenable others skilled in the art to which it appertains to make and usethe same.

This invention relates to that class of objects known to the trade assockets or collets for holding drills and other tools.

It has been found in practice that when oil or other lubricants can beconveyed to the end or working portion of a drill or cuttingtool theycan be run at a higher rate of speed and the rate of feed per revolutionof the tool increased at the same time, thereby materially increasingthe amount of work done. A common expedient to attain this object is thewell-known oil-tube drill, as it is called, which has one or morechannels, orifices, or tubes let into or formed in that part of thedrill which is left standing when the flutes are cut or otherwise formedand called the land. The shanks of such drills or tools are hollow orhave a central axial bore for the greater part of their length, andthese channels, orifices, or tubes are turned inwardly at a point nearthe shank and connected with the chamber or bore in the shank. Suchoil-tube drills or tools are used only in machines especiallyconstructed for their use, with suitable means provided for connectingthe oil-supply with the central chamber in the shank; but the greatmajority of drill presses and machines now in use are so constructedthat it is not practicable to connect the supply of oil or lubricantwith this central chamber or bore in the shank, and even if it were itwould be undesirable, because such channel or bore weakens the toolwhere it should be strong.

The object of this invention is to provide a socket or collet adapted tothe common form of drilling-machine and constructed to hold drills ortools of various sizes and kinds and provided with oil tubes, orifices,or channels and means for supplying and conducting the oil or otherlubricant to the tubes,

orifices, or channels of the drills or tools, as hereinafter fullydescribed.

My invention therefore consists in a socket or machine spindle formed orprovided with a cup or reservoir having one or more outlets and soconstructed that the oil or other and Fig. 2 is a central sectionalelevation thereof. Fig. 3 is a central sectional elevation of a form ofsocket and cup adapted to be used with the commonlyused oil-tube drillshereinbefore referred to.

The preferred form of the invention is shown in Figs. 1 and 2, and theadaptation in Fig. 3 is designed more especially to utilize a form ofdrill which has come into more or less general use and is held in stock,and hence should be provided for in my improvement. Referring,therefore, first to Figs. 1 and 2, we have the usual drill or toolsocket or collet A, and a drill B secured in said socket. The shank ofthis drill or tool is solid throughout, and about the bottom of thesocket A is an oil cup or reservoir 0, shown in this instance asseparate from the socket, but it might as well be made integraltherewith or secured on the socket in any suitable way. The drill B hasthe now well-known oil conduits, conductors, or tubes E let into theland of the drill between the flutes and connected at their upper endswith the oil cup or reservoir through holes in the bottom thereof bymeans of short pieces of rubber or other suitable tubing making theconnections. In Fig. 3 the drill or tool socket A has a drill or tool Bsocketed therein, which is pro- Vided with a central oil chamber or bore2, and a cup 0 surrounds the lower portion of the socket, as in Figs. 1and 2. To adapt the invention to this form of tool, the socket itselfand the drill-shank have one or more oil-passages 3 drilled in laterallyfrom about the bottom of the cup 0 to meet the chamber or channel 2 inthe tool, and like lateral passages 4 are formed in the shank of thedrill below the cup to establish connection with the oil conductors orconduits 5, which occupy grooves in the land of the drill, as be- 5 foredescribed.

What I claim as new, and desire to secure by Letters Patent, is

The tool-socket and an oil-reservoir surrounding the lower end thereofand an outlet for the oil from the bottom of said reservoir, 10substantially as described. 7

Witness my hand to the foregoing specification this 22d day of March,1897.

JACOB 1). COX, JR.

WVitnesses:

H. T. FISHER, H. E. MUDRA.

